projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c0959b44 AB |
1 | ##------------------------------------------------------------------------------\r |
| 2 | #\r | |
| 3 | # SpeculationBarrier() for AArch64\r | |
| 4 | #\r | |
| 5 | # Copyright (c) 2019, Linaro Ltd. All rights reserved.\r | |
| 6 | #\r | |
| 7 | # This program and the accompanying materials\r | |
| 8 | # are licensed and made available under the terms and conditions of the BSD License\r | |
| 9 | # which accompanies this distribution. The full text of the license may be found at\r | |
| 10 | # http://opensource.org/licenses/bsd-license.php.\r | |
| 11 | #\r | |
| 12 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 13 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | #\r | |
| 15 | ##------------------------------------------------------------------------------\r | |
| 16 | \r | |
| 17 | .text\r | |
| 18 | .p2align 2\r | |
| 19 | \r | |
| 20 | GCC_ASM_EXPORT(SpeculationBarrier)\r | |
| 21 | \r | |
| 22 | \r | |
| 23 | #/**\r | |
| 24 | # Uses as a barrier to stop speculative execution.\r | |
| 25 | #\r | |
| 26 | # Ensures that no later instruction will execute speculatively, until all prior\r | |
| 27 | # instructions have completed.\r | |
| 28 | #\r | |
| 29 | #**/\r | |
| 30 | #VOID\r | |
| 31 | #EFIAPI\r | |
| 32 | #SpeculationBarrier (\r | |
| 33 | # VOID\r | |
| 34 | # );\r | |
| 35 | #\r | |
| 36 | ASM_PFX(SpeculationBarrier):\r | |
| 37 | dsb\r | |
| 38 | isb\r | |
| 39 | bx lr\r |